I had used a compass in the Army in the 1970s.
Some thirty years later, when I first tried to re-teach myself how to use a
compass, these four chapters, from the Military Land Navigation Field Manual,
helped me the most. Don't think you must have a Lensatic Compass, a
Military One, like what they show here. The following files will help you,
whether you use a Military Compass, or a "Hiking Compass."